last I heard, closure for fixed wing aircraft has been put back to July.
So resurfacing can happen when its frosty and then will have to be resurfaced again in a couple of years, either that, or so there will be weather delays and the contractors will require more money.

From memory,runway was due to closed between the end of April to October.....This has now been delayed to end of July,apparently to accommodate the upcoming visit of Trump to UK,although no one seems to know exactly what part of the country he will arrive at/go to!